薄片与体积型复合吸声体吸声性能计算与优化

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关键词：复合吸声体；超薄；无纺布；体积型吸声材料；吸声系数 中图分类号： TU112.4+2 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202312020

On the sound absorption performance determination and optimization of composite sound absorber of ultra-thin and bulk porous materials

LI Yinjie 1，2 ，LI Jiazhu 1，2 ，BI Chuanxing1²，ZHANG Miao³，CHEN Jian ⋅1，2 ， TANG Sheng 1，2 （1.School of Mechanical Engineering，Hefei University of Technology，Hefei 23Ooo9，China; 2.Anhui AutomotiveNVHEngineering and Technology Research Center，Hefei 23OoO9，China; 3.Shanhe Intelligent Equipment Company Limited by Shares，Changsha 4lO1oO，China）

Abstract：Toamelioratethelow-frequencysoundabsorptionperformanceofbulk porous materials，atheoretical modelforpredict ingthesoundabsorptionofthecompositestructureincorporatingflexibleultra-thinandbulkporousmaterialsisderived.Themodel integratesJohnson-Champoux-Alard（JCA）modelandacousticimpedancemodelforflexibleultra-thinmaterials，employignon Wovenfabricandmelaminecotonasilustrativeinstances.Theaccuracyof this modelisvalidatedthrough experimentalverifica tion，and particleswarmoptimization（PSO）isemployed tooptimizetheparametersofthecompositestructure.Theanalysis re sultsindicatethattheaditionofalayerofnon-wovenfabriconthesurfaceof traditionalbulk porous materialssignificantlyenhanc esthelow-frequencysoundabsorptionperformance.Thispaperprovidesatheoreticalfoundationforthedetermination，analysis andoptiizationofthesoundabsorptionperformanceofthecompositesound-absorbingstructurecomposedofflexibleultrathin andbulkporousmaterials，Aditionally，itpresentsanefectivemethodforimprovingthelowfrequencysoundabsorptiopefor mance without changing the thickness of the original sound absorber.

Keywords：composite sound absorber;ultra-thin;non-woven fabric;bulk porous materials;sound absorptioncoeficient

多孔吸声材料（如微穿孔板、吸音棉等）广泛应用于建筑、铁路以及汽车等领域，以降低人们所处环境的噪声水平，改善舒适性。（剩余15605字）